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Method and device for switching emergency service and notifying limit area information

A technology for emergency services and restricted areas, applied in access restrictions, wireless communications, electrical components, etc., can solve problems such as UE user loss, call drop, emergency service interruption, etc., achieve simple implementation, ensure handover success rate, and realize practical effect

Inactive Publication Date: 2011-03-23
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the emergency service in the IP Multimedia Subsystem is incompatible with the emergency service in the GERAN (GSM EDGE Radio Access Network) system, the UE that establishes the emergency service in LTE cannot switch to GERAN, otherwise there will be a risk of call drop
At this time, even if the network sets the GERAN area as a restricted area, the emergency service may still be switched to the GERAN area and cause call drop. How to deal with this situation is a problem that needs to be solved at present. Once the emergency call service is switched to the GERAN area, Emergency services may be interrupted, causing immeasurable losses to UE users

Method used

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  • Method and device for switching emergency service and notifying limit area information
  • Method and device for switching emergency service and notifying limit area information
  • Method and device for switching emergency service and notifying limit area information

Examples

Experimental program
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Effect test

Embodiment 1

[0054] In the network layout of the LTE system, base station 1 and base station 2 are connected to the core network through the S1 interface respectively, and the UE resides in cell 1 under the jurisdiction of base station 1.

[0055] At a certain moment, the UE initiates an emergency service, initiates a random access request in cell 1, and establishes a radio resource control (RRC, Radio Resource Control) connection. Since it is an emergency service, the UE sends an RRC connection request (RRC Connection Request) to the base station Request) message carries the indication of emergency service. After the RRC connection is established, the UE sends non-access stratum (NAS, Non Access Stratum) signaling (ie, service request (service request) signaling) to the core network through the base station, so as to establish a communication connection with the core network side.

[0056] After the MME on the network side receives the service request sent by the UE, the MME sends an Init...

Embodiment 2

[0060] In the network layout of the LTE system, base station 1 and base station 2 are connected to the core network through the S1 interface respectively, and the UE resides in cell 1 under the jurisdiction of base station 1.

[0061] At a certain moment, the UE initiates a non-emergency service, initiates a random access request in cell 1, and establishes an RRC connection, then the UE sends a service request to the MME through base station 1, and the MME sends an initial context establishment request message to base station 1, and base station 1 is The UE allocates resources and establishes an E-RAB. The UE has successfully established the non-emergency service. At this time, the MME will not set the emergency service restricted area for the UE.

[0062] After a period of time, the UE needs to initiate an emergency service. The UE sends a service request for establishing an emergency service to the MME through base station 1 without interrupting the non-emergency service. A...

Embodiment 3

[0065] In the network layout of the LTE system, there are X2 interfaces between adjacent base stations, and the base stations are connected to the MME through the S1 interface.

[0066] The UE establishes the emergency service in the cell 1 under the jurisdiction of the base station 1. The MME sends the restricted area information dedicated to the emergency service to the base station 1 through the initial context establishment. The base station 1 stores the restricted area information for the emergency service. For details, please refer to the first embodiment related descriptions. The restricted area information for emergency services in this example includes cell information in the GERAN system and some areas in the LTE system (identified by the Approval Number (TAC) of the equipment type, and the cells of the LTE system belonging to these TACs cannot be used as the target of emergency service handover Cells, such as these cells are congested due to too much traffic).

[0...

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Abstract

The invention discloses a method for switching an emergency service, which comprises the following steps: when a base station selects a switch target cell for the emergency service, removing cells in a limit area limiting access of emergency service stored in the base station. The invention also discloses a method for notifying emergency service limit area, which comprises the following steps: in the process of establishing connection for the emergency service, a mobility management entity (MME) notifies the base station receiving a connection establishment request of the emergency service of the information of the limit area limiting the access of the emergency service; or, a source cell in a source base station determines a switch target cell in a target base station for the emergency cell; and when the switch interaction signaling is transferred by an X2 interface between the source base station and the target base station, the source base station notifies the target base station of the information of the limit area limiting the access of the emergency service stored in the source base station. The invention also provides a device for realizing the method. The scheme of the invention is simple to realize and is practical.

Description

technical field [0001] The invention relates to emergency service switching technology, in particular to a method and device for switching emergency services, and a method and device for notifying restricted areas of emergency services. Background technique [0002] With the development of flat network architecture and the emergence of various high-speed broadband mobile access methods, the evolved wireless communication system can provide higher transmission rates, shorter transmission delays and lower costs, and can also support The mobility between the internal access systems of the 3rd Generation Partnership Project (3GPP, The 3rd Generation Partnership Project), and the mobility between the 3GPP access system and the non-3GPP access system, etc., prompt the mobile communication system to propose The concept of next-generation architecture. [0003] figure 1 is a schematic diagram of the evolved wireless access network structure, such as figure 1 As shown, the base st...

Claims

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Application Information

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IPC IPC(8): H04W36/08H04W48/08H04W68/00H04W92/20
Inventor 朱春晖邓云李志军
Owner ZTE CORP